PETER MANSEAU is curator of religious history at the Smithsonian National Museum of American History. The author of numerous books, including Songs for the Butcher's Daughter and Objects of Devotion: Religion in Early America, he writes frequently on religion and history for publications including the New York Times, Atlantic, and Wall Street Journal. ANDREW ALI AGHAPOUR is Consulting Scholar of Religion and Science at the National Museum of American History. A journalist and essayist, he writes frequently about contemporary intersections of science and religion.